The option that represents specializing in the service sector would typically involve activities related to services rather than agriculture or mining. Unfortunately, it seems that the last response is incomplete.
From the provided responses:
- A country growing mainly coffee beans relates to agriculture.
- A country exporting minerals relates to mining.
Neither of these examples reflects specialization in the service sector. If there was an option related to tourism, healthcare, education, finance, or other service-related fields, that would be the appropriate choice.
Please provide the complete options to determine which one specializes in the service sector.